Bauhinia faberi via.Microphylla(BFM)is an important tree species for vegetation restoration in the dry valley of southwestern China.However,there were few studies on the application of arbuscular mycorrhizal fungi(AMF...Bauhinia faberi via.Microphylla(BFM)is an important tree species for vegetation restoration in the dry valley of southwestern China.However,there were few studies on the application of arbuscular mycorrhizal fungi(AMF)in improving the drought adaptation of BFM.In order to investigate the response of BFM to water stress(WS),we tested four inoculation treatments((no AMF,Control),Glomus mosseae(GM),Glomus intraradices(GI),Glomus mosseae+Glomus intraradices(GMI))in pots,experimented under three field water holding capacity(WHC)of 70%,50%and 30%.The changes of seedling survival rate(SR),AMF relative root length colonization rate(Col),growth,photosynthetic parameters,water status and leaf nutrients were examined.The results showed that under 30%WHC drought conditions,SR with dual inoculation of AMF was not higher than with single inoculation of GM,suggesting that increasing the diversity of AMF did not definitely improve plant SR,and that the species of inoculated AMF might have an important impact on SR.The sensitivity of dual inoculated Col to water stress was lower than that of single inoculation,which was more favorable for dual inoculated BFM seedlings adapting to drought environment.The overall drought resistance ability(D)also showed that dual inoculation of AMF improved plant drought adaptation compared with single inoculation,which was related to the higher Col of dual inoculated AMF.This study is of practical importance to promote vegetation restoration in arid areas in a cost-effective and environmentally friendly manner.展开更多
目前对不锈钢表面SiC涂层的摩擦磨损性能与制备过程中H_2流量的相关性研究较少。通过双辉等离子表面冶金技术在传动机械用12Cr13不锈钢基表面制备SiC涂层,利用表面形貌表征和摩擦磨损试验,分析了H_2流量对SiC涂层的表面形貌和耐磨性能...目前对不锈钢表面SiC涂层的摩擦磨损性能与制备过程中H_2流量的相关性研究较少。通过双辉等离子表面冶金技术在传动机械用12Cr13不锈钢基表面制备SiC涂层,利用表面形貌表征和摩擦磨损试验,分析了H_2流量对SiC涂层的表面形貌和耐磨性能的影响。结果表明:SiC涂层的表面呈现出环状与片层状花纹及凹坑、颗粒等形貌,并且随着H_2流量的增加,其表面形貌缺陷程度也不断增加,各衍射峰呈现明显的增强或者减弱趋势。12Cr13不锈钢基体磨损测试后表现出明显的磨粒磨损特点;随着H_2流量的增加,涂层与接触副接触时容易发生脆性破裂,涂层磨损明显,H_2流量达到20 m L/min时,磨痕表现为深犁沟形态,此时以黏着磨损机制为主。展开更多
基金supported by the National Key Research and Development Program of China(2017YFC0505104)"135 Project"of Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu,China(SDS–135–1707)。
文摘Bauhinia faberi via.Microphylla(BFM)is an important tree species for vegetation restoration in the dry valley of southwestern China.However,there were few studies on the application of arbuscular mycorrhizal fungi(AMF)in improving the drought adaptation of BFM.In order to investigate the response of BFM to water stress(WS),we tested four inoculation treatments((no AMF,Control),Glomus mosseae(GM),Glomus intraradices(GI),Glomus mosseae+Glomus intraradices(GMI))in pots,experimented under three field water holding capacity(WHC)of 70%,50%and 30%.The changes of seedling survival rate(SR),AMF relative root length colonization rate(Col),growth,photosynthetic parameters,water status and leaf nutrients were examined.The results showed that under 30%WHC drought conditions,SR with dual inoculation of AMF was not higher than with single inoculation of GM,suggesting that increasing the diversity of AMF did not definitely improve plant SR,and that the species of inoculated AMF might have an important impact on SR.The sensitivity of dual inoculated Col to water stress was lower than that of single inoculation,which was more favorable for dual inoculated BFM seedlings adapting to drought environment.The overall drought resistance ability(D)also showed that dual inoculation of AMF improved plant drought adaptation compared with single inoculation,which was related to the higher Col of dual inoculated AMF.This study is of practical importance to promote vegetation restoration in arid areas in a cost-effective and environmentally friendly manner.
文摘目前对不锈钢表面SiC涂层的摩擦磨损性能与制备过程中H_2流量的相关性研究较少。通过双辉等离子表面冶金技术在传动机械用12Cr13不锈钢基表面制备SiC涂层,利用表面形貌表征和摩擦磨损试验,分析了H_2流量对SiC涂层的表面形貌和耐磨性能的影响。结果表明:SiC涂层的表面呈现出环状与片层状花纹及凹坑、颗粒等形貌,并且随着H_2流量的增加,其表面形貌缺陷程度也不断增加,各衍射峰呈现明显的增强或者减弱趋势。12Cr13不锈钢基体磨损测试后表现出明显的磨粒磨损特点;随着H_2流量的增加,涂层与接触副接触时容易发生脆性破裂,涂层磨损明显,H_2流量达到20 m L/min时,磨痕表现为深犁沟形态,此时以黏着磨损机制为主。
